Update plume.mdx (#1388)

Author: benjamin852

src/content/docs/validator/external-chains/plume.mdx

@@ -193,7 +193,7 @@ Once your node is up and running, you need to add the `Plume` chain to your [amp
     type="EvmMsgVerifier"
     chain_name="plume"
     chain_finalization="RPCFinalizedBlock"
-    chain_rpc_url="youe_own_rpc"
+    chain_rpc_url="your_own_rpc"
     cosmwasm_contract="axelar1nrdqke6tcxjuymg5gyd9x3yg35n3wrgarnj3sqskp98z2xnvlx9q82f63t"
 
     [[handlers]]